Honeywell S7800A1167 Manual page 39

Table 16. Exception Codes.
Exception
Code Definition
01 Illegal An illegal function as requested. Only
Function 3, 4, 6 and 17 are supported.
02 Illegal Too many bytes requested, address
Data is out of range, register is read only,
Address or the number of address requested
is past the last register.
03 Illegal The "Preset Data" from function code
Data 6 is invalid/out of range.
Value
Address Register
(hex) (dec) Parameter Name
0000 40001 Burner Control (BC) Fault Code R
0001 40002 BC Fault String Code
0002 40003 BC Sequence State
0003 40004 BC State String Code (line 1) R
0004 40005 BC State String Code (line 2) R
0005 40006 BC Sequence time
0006 40007 BC Total cycles
0008 40009 BC Total hours
000A 40011 BC Flame 1 signal strength
000B 40012 BC Flame 2 signal strength
000C 40013 BC State Bits
000D 40014 S7830 First Out Code
000E 40015 S7830 State Bits
0010- 40017- BC Fault history record 1
0019 40026
001A- 40027- BC Fault history record 2
0023 40036
0024- 40037- BC Fault history record 3
002D 40046
002E- 40047- BC Fault history record 4
0037 40056
0038- 40057- BC Fault history record 5
0041 40066
0042- 40067- BC Fault history record 6
004B 40076
004C 40077 BC Flame Failure Response
Time
004D 40078 BC Manufacturing code
004F 40080 BC Type Code
0050 40081 S7800M/BC Software version R
0052 40083 EA Software version
0054 40085 BC Remote Command status. R
Description
Table 17. ModBus™ Register Assignments.
Read/
Write Format
U16
R U16
R U16
U16
U16
R U16
R U32
R U32
R U16
R U16
R U16
R U16
R U32
R
R
R
R
R
R
R U16
R U32
R U16
U32
R U32
U16
39
7800 SERIES S7800A1167 KEYBOARD DISPLAY MODULE
Device Address and Baud Rate
Assign each device in the system a unique address by setting the
MODBUS ADDRESS (see page 26). Only RTU communications
with 1 Start Bit, 8 Data Bits, 1 Stop Bit and no parity is supported.
NOTE: Assign a device address number from 01 to 99. 00 is
not an acceptable address number and will not work,
except for the broadcast ability of function 6.
NOTE: In Tables 10, 15 and 18: Line 1 and Line 2 refer to the
two lines of text on the S7800 Keyboard Display Mod-
ule. In Tables 21, 23 and 24: The String Code column
references Table 21, String Codes. In Table 22: The
Burner Control State Bits column references Table
21, Burner Control State Bits..
See Table 23. Non-zero value = Lockout number.
See Table 22. Lockout text.
See Table 23 (valid only if Fault code = 0).
See Table 22. Simulates Line 1 of S7800.
See Table 22. Simulates Line 2 of S7800.
0-4095 Seconds.
Max value is 0xFFFFFFFF.
Max value is 0xFFFFFFFF.
0 to 255 represents 0.0 to 25.5 volts. Not clipped to 5.0V like
S7800.
0 to 4095. N/A for 7800 SERIES.
See Table 20.
Not supported from S7800.
Newest fault record. See Table 24.
Second newest fault record. See Table 24.
Third newest fault record. See Table 24.
Fourth newest fault record. See Table 24.
Fifth newest fault record. See Table 24.
Oldest fault record. See Table 24.
Tenths of Seconds.
See Table 19.
Does not apply.
Bit 0: Autonomous.
Bit 1: Remote commanded off.
Bit 2: Remote commanded High fire.
Bit 3: Remote commanded low fire.
Bit 4: Remote reset has/will be sent to BC.
Bits 5-14: Unused.
Bit 15: Copied after the most recent write to the burner
control command (40128 bit 15).
Notes
a
65-0311—02